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Ryobi RY905500 (Discontinued)

The Ryobi RY905500 is a portable open frame generator with a rated wattage of 5500 W and a starting wattage of 6875 W.

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Ryobi RY905500Ryobi RY905500Ryobi RY905500

This product was discontinued. For your convenience, we decided to leave this page up.
It was replaced by the Ryobi RY906500S. However, you might still find it second hand on eBay, by clicking on the button below.

Description

The Ryobi 5,500-Watt Portable Generator with EasyStart technology is where efficiency meets convenience. With a Heavy Duty 420cc OHV engine, this generator delivers 5,500 Running-Watts (6,875 Surge/Starting-Watts) and is powerful enough to be used on a jobsite or as an emergency backup system. Featuring the EasyStart 3-Step starting system and a large 6 Gal. fuel tank, the Ryobi 5,500-Watt Generator can run up to 9 hours at 50% load. The Digital Hour Meter Display allows you to monitor essential functions such as Time of Use, Voltage, Hertz and Total Hours used. The Quick-Release handle provides easy and compact storage while the flat-free wheels and the Hand Truck Frame design allow for easy transport, even over rough terrain. This generator is also equipped with an Automatic Voltage Regulator that provides consistent power. The Control Panel features (4) 120-Volt 20 Amp (GFCI Protected) outlets and (1) 240-Volt Twist Lock 30 Amp outlet to meet all your power needs.

Zoom on the Ryobi RY905500

In summary, the Ryobi RY905500 is a portable generator especially useful for:

  • RV travellers looking for even more independence
  • People occasionally participating in outdoor fairs, festivals or events
  • Food truck owners who do not wish to see their business interrupted under any circumstances
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Professionals in need of safely powering high-intensity work or lighting equipment

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.

Power & Run Time

The Ryobi RY905500 in use

The Ryobi RY905500

The Ryobi RY905500's core is the 420 cc Ryobi OHV 4-stroke engine, which runs on gasoline. With an output of 120/240V, it provides a running wattage of 5500W and a peak wattage of 6875W.

At a noise rating of 78 dBA (less noisy than a vacuum cleaner), the generator is started via Ryobi's EasyStart pull-start mechanism (more information below).

The fuel capacity of 6 gallons allows the RY905500 to operate for around 10 hours at 50% load with a full tank (fuel consumption around 0.6 GPH).

As the RY905500 has a relatively high THD (<20%), it is not recommended to use it to power sensitive electronic devices.

Outlets

The control panel includes the following 5 AC outlets:

Two Duplexes 120V 20A (5-20R) GFCI
120/240V 30A (L14-30R) receptacle

As it features a twist-lock L14-30R receptacle, the RY905500 is transfer switch ready: in case of a power outage, you will be easily able to connect it to a breaker box and power your household.

Portability

The dimensions of the Ryobi RY905500, which are L31.5 x W29 x H24 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The design is ideal for rough environments and demanding outdoor use.

Even though this device may be technically portable (as in movable), manipulation and transportation without special equipment can be a challenge, as it weighs 192 pounds. Still, once it is on the ground, its wheel kit and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.

EasyStart Mechanism

ryobi easystart starting mechanism

Ryobi's 3-step EasyStart mechanism

The unit benefits from Ryobi’s EasyStart mechanism. This 3-step starting system allows you to easily start your generator. It works in the following way:

  1. Put the engine switch on the “ON” position, and place the lever on the “START” position
  2. Pull the recoil until the engine runs
  3. Let the engine run 15 to 30 seconds and place the lever on the “RUN” position

Features

Panel of the Ryobi RY905500

The RY905500's control panel

The RY905500's status and activity may be monitored conveniently via the control panel, as it features a convenient meter, which displays voltage, frequency and lifetime hours.

From a security standpoint, the product offers an overload protection (circuit breaker) and an automatic low oil shut-off, allowing you to use it with a peace of mind.

Besides the classic documentation and an owner's manual (opens in a new tab) to get you promptly started, the Ryobi RY905500 also comes with some accessories: oil and tool kit are included.

Emissions

The Ryobi RY905500 is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor, which makes it suitable for use in forested areas.

Product Video

The Ryobi RY905500 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Ryobi RY905500 compare to generators of similar power (between 5000 and 6000 W).

  • With its weight of 192 lbs, the Ryobi RY905500 is one of the heavier generators in the 5000-6000 rated wattage category. Regarding dry weight, one of the champions in the same power range is the Genmax GM6000XiE, with a dry weight of only 106.9 lbs.
  • As this generator has its lowest possible noise of 78 dBA, it should be considered noisier compared to its peers of a comparable running wattage. If you are concerned with noise, check out the Honda EU7000iS, which is one of the least noisy generators in its power range, with a noise rating of just 52 dBA.
  • Autonomy-wise, with around 10 hours on a full tank at a 50% load, the RY905500 is on the low end when compared to other generators of a similar power output. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Westinghouse WGen5500, reaching around 15 hours.
  • Run times are important, yet thanks to their dependence on the fuel capacity, they should be judged along with the fuel consumption of the device. This generator has an average fuel consumption among comparably powerful devices, as it reaches 0.6 GPH (gallon per hour) at a 50% load. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.36 GPH, the A-iPower SUA7000L is a device you could look out for.

The bottom line

STRENGTHS:
  • Several accessories included
  • GFCI Outlets
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • No electric start
  • Not CARB-compliant
  • On the heavy side (192 lbs)
  • On the noisy side (78 dBA)
  • Relatively low run time

Do you own the Ryobi RY905500 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine420 cc Ryobi OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120/240V 60 Hz
Running watts5500 W
Starting watts6875 W
Running amps (@120/240V)45.8/22.9 amps
Peak amps (@120/240V)57.3/28.6 amps
Run time @50% load10 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerVFT
IndicatorsNo
Fuel tank6 gal
Fuel gaugeNo
Misc
Weight192 lbs
Approx. dimensions (L x W x H)31.5 x 29 x 24 in
Noise (lower limit)78 dBA
THD< 20%
ComplianceEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, tool kit, and wheel kit
Warranty3 years
UPC046396010056

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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About Ryobi

Founded in 1943, Ryobi Limited is a Japanese based manufacturer that throughout its history mainly focused on electrical and automotive components. However, their quite recent power tool branch has proven to be popular for the quality and reliability of its products, which are nowadays found globally on the shelves of popular retailers. Ryobi products are listed to be produced in various locations globally, mainly US, Germany, Japan and China.

Warranty Information

The Ryobi RY905500 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Ryobi generators, please consult Ryobi's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-525-2579.

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our wattage calculator.
ItemRunning WattsStarting Watts
At homeAC (10,000 BTU)15002200
Microwave (1000 watts)15001500
Sump pump (1/2 hp)10502150
Refrigerator (energy star)1921192
Radio100100
Set of 5 LED light bulbs5555
Total4397 W5497 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Hair dryer18001900
Radiant heater13001300
Radio100100
Total4390 W4980 W
For workTable saw18004500
Grinder14002500
Reciprocating saw730960
Bug zapper8080
Total4010 W6710 W
Is there a conversion kit to electric start? (Asked October 15, 2019)

As far as we know, there are no official conversion kits that serve that purpose.

what spark plug belongs in the 420 cc (Asked November 06, 2021)

Spark plug should be LG F7TC or equivalent.

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